Re: [mm patch] oprofile: backtrace operation does not initialized

[John Levon <levon@movementarian.org>]

On Thu, Dec 09, 2004 at 11:53:53PM +0900, Akinobu Mita wrote:

> Or, It may be better to revert the return type of oprofile_arch_init()
> from "void" to "int"  to get the result of initialization.
> Though I don't know when/why its interface was changed. and some
> architectures (ppc, sh64, m32r) remain to have old interfaces in -mm.

I've also lost track of why we don't return -ENODEV from the
arch_init().

We should set -ENODEV after setting ->backtrace as appropriate. Then the
code should do what it used to do:

    138         int err = oprofile_arch_init(&oprofile_ops);
    139
    140         if (err == -ENODEV || timer) {
    141                 timer_init(&oprofile_ops);
    142                 err = 0;
    143         } else if (err) {
    144                 goto out;
    145         }

john